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Original question:

LMK04832: Unlock previous thread

LMK04832: Vibration Testing

Bradley Higgin
Intellectual 535 points

Part Number: LMK04832

Tool/software:

I'm assuming the 2nd loop has a quartz oscillator, or is it MEMS?

Do you have any vibration performance test data?

BTW, I successfully integrated my low-pull-range oscillator with the help provided by:

https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1296858/lmk04832-control-voltage-and-pull-range/4920692

https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1330943/lmk04832-unlock-previous-thread/5065997

Thank you!

Best regards,


Brad

  • 0
    TI__Mastermind 35440 points

    PLL2 integrated VCO is an integrated L-C tank circuit with the inductors and capacitors made out of metal layers on-chip. Nothing on-chip is going to be substantially susceptible to vibration like how it would with quartz, and it's solid-state metal layers so there's no moving parts or dependency on ambient pressure/gas diffusion like with MEMS. You're more likely to see vibration issues from piezoelectric effects of capacitors in the loop filter or on the LDOBYP1/2 pins, which comes down to a choice of component.

    I'm 95% confident we do not have any vibration testing data for LMK04832 internal VCO. I'm marking this as resolved for now in expectation that the remaining 5% uncertainty will be resolved and we have no data, but if we do have any data, I'll come back and update the thread. You're welcome to keep asking related questions in this thread if you have them.